Reenforced truck bolster



March 3- H. c. DREIBUSS Er AL REENFORCED TRUCK BOLSTER Fil ed April 14, 1930 5 Sheets-Sheet 1 UHlmllHi H. s. DREZBUSS ET AL 1,902,807

REENFORCED TRUCK BOLSTER Filed April 14, 1930 March 21, 1933.

5 Sheets-Sheet 2 March 1933- H. c. DREIBUSS ET'AL REEKFORCED TRUCK BOLSi'ER Filed April 14. 1930 5 Sheets-Sheet 3 sil Patented Mar. 21, 1933 UNITED STATES PATENT OFFICE HARRY O. DREIBIISS AND GEORGE S. CHILE8, 03 8'1. IDUIS, MISSOURI, ASSIGN'ORS TO SOUIILIN STEEL 00., 01 ST. LOUIS, MISSOURI, A. CORPORATION OF DELAWARE nnmn'oncnn 'rnucx 30mm;

Application filed April 14, mo. Serial mi. 444,180.

This invention relates to truck bolsters, and is illustrated as embodied in a box type of bolster having cross reenforcing members generally of tubular shape which are in effect continuations of flanges about holes in the walls which they brace. 1

It has been found that bolsters constructed accordin to former practices do not perform as atrue m and that each wall is distorted beyond the expected deflection under load. For example, with one type of bolster it was found that under severe excess load the top wall or compression member would buckle at about the position of the line 44 in Figure 2. This buckling generally took the form of a caving in of the transverse center portion of the wall. At the same time, the sale members were pushed outwardly at their centers.

- By careful measurements, it was found that even under small and normal loads there occured a certain amount of undesirable breathing or bulging at the sides. Though ithas formerly been proposed to ,provide ribs or webs within truck bolsters, such ribs have never been found thoroughly satisfactory partly because of .not being located at the proper place and partly because of the poor oundry practice attending their use since the involved undesirable intersecting walls.

(hie object of the'invention is to rovide stronger bolsters for a given weight o v metal.

Another object is to provide a bolster in which the stresses more nearly correspond to those in a true beam.

Anadditional object of the invention is to provide a box type of bolster in which the various sides are reenforced, tied or supported by members which are formed integral therewith without being objectionable to good foundry practice, and especially havmg as few intersectin walls as ossible.

Other objects 0 the invent on will appear from the following description, drawings and claims. i

In the drawings, in which like numerals are used for similar parts throughout Figure 1 is a plan view of a little more than half of a bolster, it being understood that the other half is identical therewith, as is the case of all the similar figures;

Figure 2 is a vertical longitudinal section i); the bplster shown through the line 22 of igure 3 is a section taken on the line 33 1 of gure 1 through the center of the bolster; '68

F1gure 4 is a section taken on line 44 of F 1 re 2; p igure 5 is a section taken on the line 5-5 of Figure 2 through the side bearing; 1 F1gures 6, 7, 8, 9 and 10 are corres views of a modified form of truck bo ster;

Flgure 11 is a plan view of a modified end construction which can be used with either of the bolsters of Figures 1 to 10;

Figures 12 and 13 are cross-sections taken II on the lines 1212 Fi ure 11; v

igure 14 is a plan view illustrating an additional modification which may be used in and 13-13 respectively of either of the bolsters, and also illustrating" the relation of such a bolster to the paratus; I

Figure 15 is a section taken along the line 15-15 of Figure 14; and

Figure 16 1s a partial through the line 1616 of igure 15.

Figure 17 is a section, corresponding to 122g. 9, of a further modification of the bols r brake aponding 00 lOIigflZlldlIlal section Each of the bolsters embodying this in- 8 vention includes a center plate 10 which is adapted to pivotally support a car, spring seats 12 upon which the bolster in turn rests, and side bearings 14. which will limit the rockin of the car with respect to the bolster and ta e rying portions of the load. As is customary, the box type bolster includes a top wall or compressional member 16, of which the center plate and side bearings are parts; a; bottom wall or tensional member 18 which includes the spring seat, and two side walls 20'and 22 which act as compressional and tensional members with respect to horizontal loads transverse of the bolster and act as shear loads.

As described above, it hasbeen found that previous forms of bolsters did not support plates with respect to vertical their loads with uniform deflection but that. me

the sides would bulge and the top walls would tend to buckle or cave in along the center.

One manner of overcoming these difliculties has been illustrated in Figure 1, in which tubular cross-members are shown. Thus a tubular member 24 has been located at the former buckling point and extends between the upper or compressional member and the lower or tensional member. This of course would add to the vertical strength of that portion of the upper member the additional vertical strength of the same portion of the lower member. There has'in addition been rovided'a horizontal cross-member 26, also in the form of a tube, which is integral with tube 24. This cross-member 26 not only ties the sides against spreading but acts as a that is,

beam to transmit to the sides the load which tends to buckle the top. Thusthe upper half of the tube 24 acts as a column. restlng upon the horizontal tube or beam 26. Wherever possible, intersections in the main walls of the bolster are avoided. Thus instead of having the tubular column-member 24 mtersect with a solid top, the tube is made as a continuation of the metal in the top wall, it has a non-intersecting reentrant junction with said wall. It is thus in the nature of a flange surrounding a hole in the top member and continued downand made integral with a similar flange surroundin a hole in the bottom member. This provi es continuous lines of metal which merely curve from the wall into the tube and permit a uniform flow of metal at the corners, This was not possible with the reenforcing web structures heretofore suggested.

The side hearing has been similarly reenforced by means of a tubular column 28 which aids in the support of the side frames and in turn is supported by the tubular beam 30 which is supported by the side walls and which ties said walls into proper relation. As illustrated, the tubular beam or crossmember 30 is formed with the previously described non-intersecting reentrant junctions with said walls 20 and 22, though the tubular'column 28vis illustrated as intersecting the side bearing 14. This intersection may be avoided by the formation of a hole in a way similar to that shown in Figure 7. In any event, an additional bearing plate may be attached if desired.

' The center plate 10 may be supported by a tubular column 32 which is in turn supported by a tubular cross-shaft or beam 34,

.which latter is integral with the sides in the same manner as tubular'cross-members 26 and 30. A support 36 may be provided to maintain the center pin 38 in proper position. Core support holes of course are pro- .vided wherever necessary. For this pur- ;pose,the tubes are beneficial as the core support holes may be left through the tulies, or

as pointed out hereinafter large of the tubes may-be omitte portions ThGT-OllStlllCtlOIl of Figures 6 to 10 is very I lar column 56 thereabove has been partly cut down to the flange 56 and the portions ,58. Below the member 54 there has been provided an additional tie member 60 which is an extension of a portion of the flange 62.

Below the member 54 there has been pro vided an additional tie member 60 which is an extension of a portion of the flange 62.

The flange 62 extends around a large hole in the tensional member 18, it having been found that the metal from this hole can thus be saved.

The top wall is braced at its buckling point by the partially cut away column 66 which in this modification is entirely supported by cross-beam 68, which is also reduced to a minimum, and the side walls. The column 66 may be of curved or of fiat cross-section.

In this embodiment (Figure 6), a slightly different construction of the center portion has been shown in which the tubular column 69 is partially cut away and is supported by the skeleton of the horizontal tubular beam 7 0. The bottom member of this beam is so located that it may support the center pin. A tube or parts thereof 72 may be provided to properly space the beam 70 and the bolsters bottom wall or tensional member 18. If desired, its junction may also be of the reentrant flange type.

The spring seat is backed up by the vertical tube or column 76 which is integral with abeam or horizontal tube 78. Both of these tubular members may be cut away in part as shown.

' A further modification of the spring seat structure is illustrated in Figures 11 to 13,

in which there is no cross-tube, the vertical tube portion or flange 80 having extension 81 oined to the top member of the bolster. It

is noted in all of these end constructions, the

reenforcing members have the preferred-continuous line non-intersecting reentrant unction with the walls to which they are con nected. Obviously either one of these end constructions may-be used with either of the bolstersof Figure 1 or Figure 6.

Wherever the cross-members herein described are used, the unnecessary parts of metal may be omitted in casting to decrease the amount of metal used. Where a part is' cut away in this manner, the most eflective part of course is retained. Thus in Figure in a similar manner 10 the side portions 540i the cross-beam are retained, each side portion bein more effective as a beam than would be either the top or bottom portion, and just as eflective as a tie member. Also, it is noted that the portion 58 of the vertical column extending from said beam is of greater curvature, thus increasing its strength as a column.

In Figures 14 to 16 are illustrated certain modifications which may be used with any previously" described modifications. It is sometimes desirable to have the brake rods located above the bottom of the truck bolster and to have the connecting rod 82 extend throu h the bolster. This adds an element of sa ety to the brakes in case of disconnection or breakage of some parts. In order to better provide for this arrangement of brake rods, tubular passages transverse of the bolster may be provided. Although only one is necessary, two are provided in order to avoid having right and left sides of the bolster.

hese passages are provided by a formation of holes havmg tubular flanges 83, continued as cross-members 84,'integral with the sides of the bolster in the same manner as described in connection with other figures, that is, these pipes are in the nature of extended flanges around the holes in the sides. The tubes therefore perform the additional function of 'tieing the sides and of serving as beams to give additional support to the center plate 10 throu h the legs 85 forming extensions of the tu ular flanges 86. Two of the legs 85 are provided with extensions 88 which may intersect with the bottom of the bolster, or 1121a join therewith in continuous lines.

deeper, that is, of a little larger size from that event, the spring plank 90 will be some- What lowered in The spring plank form.

It is to be understood that many other embodiments of the invention, including some 90 is otherwise of the usual in improved form, will be apparent and in der of the tube .cut away.

the course of time will be devised by those skilled in the art. Our invention includes all of these which come within the spirit'of the following claims, construed as broadly as the prior art will permit.

We claim:

1. A truck bolster including a compressional member, a tensipnal member, and a reenforcing member integral therewith comprising a portion of a tube with the remain- 2. A truck bolster including a compressional member, and a tensional member, one of said members having a hole therethrough and having a flange curving toward the other of said members at the edge of said hole, the

flange being extended and integrally'connected to said other member.

' verse planes,

esired, the bolster may be made a little the middle, as indicated.

with for minimizing 3. A truck bolster including a compresother around the edge of said hole, the

flanges being extended and integrally connected to each other.

4. A truck bolster comprising a hollow casting, a partially tubular reenforcing member'integral with opposite sides of said hollow casting, a partially tubular member integral with a third side of said casting, said partially tubular members being rigidly connected and in substantially the same transverse planes. 5. A truck bolster comprising a hollow casting, a partially tubular reenforcing member integral with opposite sides of said hollow casting, a partially tubular member integral with a third side of said casting, said partially tubular members being rigidly connected and in substantially the same transone of the partially tubular members having'a non-intersecting junction with the side of the hollow casting.

6. A truck bolster of the box type including an upper-compressional member, a curved cross-sectioned column supporting its transverse center, and a beam supporting the foot of said column and supported by thesides.

7. A truck bolster of the box type including an upper com ressional member, a curved cross-sectloned co umn supporting its transverse center, and a beam supporting said column and supported by th e sides, said.

beam in part 'bemg tubular and being a substantial continuation'of the side portions.

8. A truck bolster of the box type including an upper compressional member, a column supporting its transverse center, and a beam supporting said column arid supported by the sides, the center of said column passing through the cross-sectional limits of said beam. 7

9. A truck bolster of the box type includlng spacedcolumns supporting the transverse center of the upper wall, and a curved crosssectioned beam supporting each of said colmand supported by the side walls of the 10. A- truck bolster of the mg an upper compressional memberhaving a side aring portion, a column supporting Its transverse center and a curved cross-sectioned beam supporting said column and supported by the side walls of the bolster.

11. A truck bolster of the box type including at least four spaced tie members extending between the side walls at about their vertical centers and formed integral therethe breathing of said walls, said tie members being at least pa'rtially tubular and joining the side walls in the orm of reentrant flanges thereon.

12. A truck bolster of the box type includbox type includ-v ing at least'fou'r spaced tie members extendmg between the side walls at about their vertical centers and formed integral therewith for minimizing the breathing of said walls, said tie members being at least partially tubular and joining the side walls in the form of reentrant flanges thereon, and vertical columns supported thereby and supporting the transverse center of the upper wall.

13. A truck bolster of the box type including a center plate, sidewalls and a bottom, said side walls each having a hole therethrough near said center plate through which a brake rod may pass and of sufficient size to permit the necessary relative movement between the brake rod and the bolster, a flange at the edge of each hole curving toward the other side wall for compensating for the weakening eflect of said holes, and integral extensions connecting said flanges.

14. A truck bolster of the box type including a center plate, side walls and inner members for supporting said center plate, said side walls and inner members all having a passage therethrough through which a brake rod may pass and of sufiicient size to permit the necessary relative movement between the brake rod and the bolster, and a flange curved from the edge of the opening of said passage in each of said side walls, said inner members forming integral extensions connecting said flanges.

15. A truck bolster of the box type including a center plate, side walls and inner members for supporting said center plate, said side walls and inner members all having a passage therethrough through which a brake rod may pass and of sufiicient size to permit the necessary relative movement between the brake-= rod and the bolster, a flange curved from the edge of the opening of said passage in each of said side walls, and integral extensions connecting said flanges. a

Signed at St. Louis, Missouri, this 2nd day of April, 1930. a

" HARRY C. DREIBUSS.

' GEORGE S. CHILES. 

